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789d2160de
Makes progress towards #3817 --------- Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
31 lines
994 B
Rust
31 lines
994 B
Rust
//! Linux-specific things like DNS control methods
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const FIREZONE_DNS_CONTROL: &str = "FIREZONE_DNS_CONTROL";
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pub mod etc_resolv_conf;
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#[derive(Clone, Debug)]
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pub enum DnsControlMethod {
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/// Back up `/etc/resolv.conf` and replace it with our own
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///
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/// Only suitable for the Alpine CI containers and maybe something like an
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/// embedded system
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EtcResolvConf,
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/// Cooperate with NetworkManager (TODO)
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NetworkManager,
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/// Cooperate with `systemd-resolved`
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///
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/// Suitable for most Ubuntu systems, probably
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Systemd,
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}
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/// Reads FIREZONE_DNS_CONTROL. Returns None if invalid or not set
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pub fn get_dns_control_from_env() -> Option<DnsControlMethod> {
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match std::env::var(FIREZONE_DNS_CONTROL).as_deref() {
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Ok("etc-resolv-conf") => Some(DnsControlMethod::EtcResolvConf),
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Ok("network-manager") => Some(DnsControlMethod::NetworkManager),
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Ok("systemd-resolved") => Some(DnsControlMethod::Systemd),
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_ => None,
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}
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}
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